ABB Relion REQ650, Applications Manual

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Table of contents
Section 1 Introduction.....................................................................15
This manual...................................................................................... 15
Intended audience............................................................................ 15
Product documentation.....................................................................16
Product documentation set..........................................................16
Document revision history........................................................... 17
Related documents......................................................................17
Symbols and conventions.................................................................18
Symbols.......................................................................................18
Document conventions................................................................19
Section 2 Application......................................................................21
REQ650 application..........................................................................21
Available functions............................................................................25
Back-up protection functions....................................................... 25
Control and monitoring functions.................................................26
Station communication................................................................ 29
Basic IED functions..................................................................... 31
REQ650 application examples......................................................... 31
Adaptation to different applications............................................. 31
Line bay in a solidly earthed network, connected to single
busbar switchyard........................................................................32
Line bay in a high impedance earthed network, connected to
single busbar switchyard............................................................. 33
Line bay in a solidly earthed network, connected to double
busbar switchyard........................................................................34
Line bay in a high impedance earthed network, connected to
double busbar switchyard............................................................35
Functionality table........................................................................35
Transformer bay in a solidly earthed network, connected to
single busbar switchyard............................................................. 38
Transformer bay in a solidly earthed network, connected to
double busbar switchyard............................................................39
Transformer bay in a high impedance earthed network,
connected to single busbar switchyard........................................40
Functionality table........................................................................40
Section 3 REQ650 setting examples..............................................43
Setting example for a line bay with backup protection unit
REQ650 A01.................................................................................... 43
Calculating settings for analogue TRM inputs 4I 1I 5U............... 45
Table of contents
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Application manual